Garrett D'Amore wrote: > As far as this case goes, I'd better like to understand why we needed > a new class, instead of just using SYS.
That's the key question, which I haven't really seen anyone address in this PSARC email thread. However, you can find a high-level answer in CR 6806882: "The basic issue is that the SYS scheduling class was not designed for long-running CPU intensive workloads. We introduce a new SDC (System Duty Cycle) scheduling class, which adjusts its threads' priority in order to give them a specified percentage of the processor. It also gives them a scheduling quantum, which gives other threads at the same priority on the same CPU a chance to run." Scott -- Scott Rotondo Principal Engineer, Solaris Security Technologies President, Trusted Computing Group Phone/FAX: +1 408 850 3655 (Internal x68278)